Ambassador Serge Mombouli, the longest-serving African envoy to the United States, representing the Republic of Congo, died in Washington on Sept. 5 following an illness. Born the son of a diplomat in the Congolese city of Pointe-Noire in 1959, Mombouli earned a degree in corporate law from the National Conservatory of Arts and Professions in Paris. He began his career in the private sector, working in the corporate sales division of Air Afrique in Paris and was vice president of the A.W.E. In 1995, he became vice president of international operations and project development at Transworld Consortium Corporation, also based in Houston. In 2015, he became the dean of the African diplomatic corps in Washington following the death of his colleague, Ambassador Roble Olhaye, of Djibouti.